# PHATHOM PHARMACEUTICALS INC COM

PHATHOM PHARMACEUTICALS INC COM is a security (CUSIP 71722W107) tracked across SEC portfolio filings. 167 institutional managers reported $721.0M on Form 13F as of 2026-06-30; 14 registered fund positions totaling $39.3M via N-PORT as of 2026-05-31.

## Summary

- Issuer: PHATHOM PHARMACEUTICALS INC
- Class: COM
- CUSIP: 71722W107
- Asset category: EC
- 13F holders: 167
- 13F value: $721.0M
- 13F period: 2026-06-30
- N-PORT fund positions: 14
- N-PORT value: $39.3M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 167 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [Frazier Life Sciences Management, L.P.](https://search.stillhousedata.com/firm/317522) | MENLO PARK, CA | $138.5M | 12,466,489 |
| Medicxi Ventures Management (Jersey) Ltd | ST. HELIER, Y9 | $81.0M | 7,464,572 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $52.7M | 3,177,211 |
| BlackRock, Inc. | New York, NY | $45.1M | 4,061,996 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $44.7M | 4,022,909 |
| [Carlyle Group Inc.](https://search.stillhousedata.com/firm/111128) | WASHINGTON, DC | $38.8M | 3,496,808 |
| [NEA Management Company, LLC](https://search.stillhousedata.com/firm/161004) | TIMONIUM, MD | $21.8M | 1,960,169 |
| [683 Capital Management, LLC](https://search.stillhousedata.com/firm/156181) | NEW YORK, NY | $20.6M | 1,850,000 |
| Ensign Peak Advisors, Inc | SALT LAKE CITY, UT | $18.1M | 1,627,806 |
| [Catalys Pacific, LLC](https://search.stillhousedata.com/firm/301379) | TOKYO, M0 | $16.2M | 1,493,854 |
| STATE STREET CORP | BOSTON, MA | $15.4M | 1,386,890 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $14.8M | 1,328,045 |
| [WASATCH ADVISORS LP](https://search.stillhousedata.com/firm/6081) | SALT LAKE CITY, UT | $14.2M | 1,307,247 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | PHILADELPHIA, PA | $13.4M | 1,205,369 |
| [SummitTX Capital, L.P.](https://search.stillhousedata.com/firm/333741) | FORT WORTH, TX | $11.1M | 995,885 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [Invesco Global Fund](https://search.stillhousedata.com/fund/S000064624) | AIM International Mutual Funds (Invesco International Mutual Funds) | $26.2M | 28.81% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $6.2M | 0.76% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $2.3M | 1.30% |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $1.3M | 0.58% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $837K | 1.74% |
| [VANGUARD U.S. MOMENTUM FACTOR ETF](https://search.stillhousedata.com/fund/S000061302) | VANGUARD WELLINGTON FUND | $751K | 4.09% |
| [Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF](https://search.stillhousedata.com/fund/S000048296) | Goldman Sachs ETF Trust | $475K | 4.82% |
| [AMG GW&K Small/Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000030192) | AMG Funds IV | $426K | 102.15% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $382K | 0.06% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $316K | 0.10% |
| [DWS Small Cap Index VIP](https://search.stillhousedata.com/fund/S000006223) | DEUTSCHE DWS INVESTMENTS VIT FUNDS | $72K | 1.72% |
| [TIAA Separate Account VA-1 - Stock Index Account](https://search.stillhousedata.com/fund/S000005098) | TIAA Separate Account VA-1 | $6K | 0.05% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $3K | 0.01% |
| Guggenheim Active Allocation Fund | Guggenheim Active Allocation Fund | $1K | 0.02% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/71722W107.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.